905715020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{21493}}^1$

素因数の和:21559

約数の個数: 72

約数和(自身を含む): 2264091984

約数和(自身を除く): 1358376964

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 43, 49, 70, 86, 98, 140, 172, 196, 215, 245, 301, 430, 490, 602, 860, 980, 1204, 1505, 2107, 3010, 4214, 6020, 8428, 10535, 21070, 21493, 42140, 42986, 85972, 107465, 150451, 214930, 300902, 429860, 601804, 752255, 924199, 1053157, 1504510, 1848398, 2106314, 3009020, 3696796, 4212628, 4620995, 5265785, 6469393, 9241990, 10531570, 12938786, 18483980, 21063140, 25877572, 32346965, 45285751, 64693930, 90571502, 129387860, 181143004, 226428755, 452857510, 905715020]

約数ペア:

[(1, 905715020), (2, 452857510), (4, 226428755), (5, 181143004), (7, 129387860), (10, 90571502), (14, 64693930), (20, 45285751), (28, 32346965), (35, 25877572), (43, 21063140), (49, 18483980), (70, 12938786), (86, 10531570), (98, 9241990), (140, 6469393), (172, 5265785), (196, 4620995), (215, 4212628), (245, 3696796), (301, 3009020), (430, 2106314), (490, 1848398), (602, 1504510), (860, 1053157), (980, 924199), (1204, 752255), (1505, 601804), (2107, 429860), (3010, 300902), (4214, 214930), (6020, 150451), (8428, 107465), (10535, 85972), (21070, 42986), (21493, 42140)]